Expansible chuck



Apri1z1,1942. y F, P, BENNETT `2,230,370

EXPANS IBLE CHUQK Filed oct. 14, 1940 f sheets-sheet 1 32a 32 29 2a 54 i? 4g 46 52 g4 4/ 4041.58

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2/ 0 3 38 29 8 54 50 -53 5/ mvENTR l 7 FRAN/(L R BENNETT l ma y ATTORNEYS April 21, 1942. \F P. BENNETT 2,280,370

y EXPANSIBLE CHUCK Filed Oct. 14, 1940 2 Sheets-Shet 2 'l I NVENTQR 22 F |G |4 w z FnA/vKLB/NBE/vA/Err.

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` ATTORNEYS Patented AprrZl, 1942` vUNITED S'Iki'TlSl PATENT OFFICE EXPANSIBLE CHUCK `Fmiklm P. Bennett, seattle, Wash. Application October 14, 1940, Serial No. 361,087

. 1o claims. C1`.242-`72)` l i My present invention relates to an expansible chuck and is particularly designed for cooperative use with the conventional paper roll tube of the type employed in the newspaper industry.

The conventional practice is to roll the paper Because of the extreme weight of a roll of paper and the great amount of inertia that has onto cores as it leaves the paper making machine and these rolls are generally of considerable size. As a core for the wrapped paper a heavy tube of paper is used` having an inner diameter of approximately three inches andan outer diameter of approximately four inches. Heretofore the rolls have been mounted upon a mandrel to which is attached a brakingmechanism. As the paper is fed into the printing machine the brake mechanism is setto provide" the .proper drag on the roll.

In order to avoid the previously necessary interruption of the printing operation that has occurred when the lead of paper is transferred fromone roll to another, a device known as the Woods y paster has been produced. In this device means are provided for mounting a roll `of paper which is being` drawn into the printing machine by the mechanism thereof. AAdditional means are providedfor mounting an auxiliary roll of paper which will be fed to the printing mechanism upon the complete `depletion of the paper from'the roll then feeding `to the printing machine.` Ordinarily `this auxiliary roll is prepared by being glued along a portion` of its length and is then positioned close tothe path Vof` the speeding paper. i i

Before `the newsprint being `fed to the machine can be pasted tothe auxiliary roll it `is necessary that theauxiliary roll be driven at a high rate of speed. This speed should be comparable to that of the feeding roll and whenthe exact moment comes for applying the `feeding roll strip to the auxiliary roll an operator presses a lever which causes the speeding ribbon of paper to be pressed downwardly upon the auxiliary roll at the exact point where it has been previously prepared with adhesive.

The speeding strip of paper then-picks up a ribbonfrom the auxiliary roll and it is in turn severed to the rear of the glued portion and the new ribbon of` paper is vfed into `the printing machine. Previous to the development ofthis pasting mechanism it was not necessary to iinpart motion to the roll other` than that created by dragging the paper from the'roll. However,

with the pasting mechanism described a positive drive mustbe supplied for the roll of paper in order that it will attain a speedsuiiiciently high to make the pasting operation successful.

to be overcome,` the core of the roll used in connection with the pasting mechanism must be of heavy metal and are usually of steel tubing or cast iron pipe. These tubes are provided with a suitable notch at one end or at both Vends, which is engaged by a key on a driven gudgeon. Motionisthus imparted at the center ofthe roll.

After the newspaper and `scrap have been removed from the iron plate or steel tube they must be stored until a suicient quantity has `accumulated for it to become economical to ship Another object of my invention relates to the provision of an expansible chuck for cooperative use` with paper tube or core employed in the conventional paper roll, which expansible chuck may be readily inserted and removed without `the necessity of using skilled labor or elaborate tools.

A` further object of my invention is `to prolvide an expansible chuck having a minimum number of sturdy parts for the utmost of simplicity and economy in manufacture and for long use without failure that may occurr in delicate mechanisms.

Still another object of my invention is the,

provision of an expansible chuck which is so constructed that there is no possibility oi its bethe provision of an expansible chuck which can be inserted into the end of a paper roll and expanded Within the opening thereof without varying the relationship of the roll and the supporting bearing thus provided to the axis of the core or of the roll thereon.

Also an object of my invention is to provide an expansible chuck to which may be associated driving means for imparting a rotating motion to the roll into which the chuck has been expanded and which will at the same time support the chuck upon the gudgeon of the ordinary pasting mechanism usually employed in high speed news printing.

Other objects and advantages of the invention will be apparent during the course of the following description wherein I have illustrated a preferred form of my invention. Of course, it will be apparent that changes and modifications can be expected in the invention without departing from the spirit thereof and of the subjoined claims wherein the scope of my invention is defined.

In Figure 1 I illustrate in an lelevational view f the expansible chuck of my invention, as though inserted in an end of a paper roll tube and indicating therearound a plurality of layers of rolled paper,

Figure v2 is a medial sectional view taken through the expansible chuck, indicating the expanded position,

Figure 3 is a similar medial sectional view of the expansible chuck indicating a contracted position,

Figures 4, 5 and 6 are cross-sectional views taken on lines 4 4, 5 5 and 6-5 respectively of Figure 2,

Figure '7 is a cross-sectional view taken along line 1 1 of Figure 3,

Figure 8 is a perspectiveview of the main chuck main body member, showing the expander wedges thereon,

Figure 9 is a perspective View of the screw member employed in the chuck,

Figure l1G is an inner perspective view of a segmental, extensible leaf employed in a chuck,

Figure 11 is a. longitudinal section through one of thechuckleaves illustrated .in perspective view ofFigureY 10,

Figure 12 is a perspective View of a washer employed in connection with the member of Figvure 8, to provide a centering bearing for the inner end ofthe screw of Figure 9,

Figure 13 is a perspectiveview of the non- Vrevolvable traveler nut employed in. connection with the screw of Figure 9.,

Figure` 14 is a longitudinal section taken through the body member of Figure 8, and

Figure 15 is a bracketed perspective view of the nut and cotter pin which provide a free-fioating anchor for the screw of Figure 9.

The numeral'll'n in Figure 1 designates an arm suitable for supporting one end of a paper roll. In the arm l5 is mounted a drive spindle I5 which is caused to rotate therein for the purpose of driving a paper roll that mayhave been mounted in the spindle. A boss Il on the outer end of the spindle I6 is provided with key i6 and is engageable in the socket YheadV 2U of the chuck. The head 2U includes the socket 2l and a peripheral keyway 22 for engagement with the key i8. Extending from the head 29 of the chuck is the tapered arbor 24 in which is mounted the operating mechanism for a plurality of chuck jaw leaves which may be mounted exteriorly thereof.

In the drawings I have shown the arbor 24 as having a plurality of wedge members 25 which be seen in Figure 8 the arbor 24 has also a plurality of longitudinal slots 28 which are positioned between each pair of adjoining wedges.

Adjacent one end of each slot 28 is an enlarged opening 25 for a purpose to be described later.

In that end of the arbor 2d having the generally smaller cross section, I provide the bearing seat 3D and the central passage 3i for the reception of one end of an actuator bolt. On the outer end of the arbor I form the bearing seat 32 for the actuator bolt.y Bolt 34 comprises the enlarged bolt head 35 having formed therein the wrench socket 3l and said bolt head cooperates with the washer 33 of Figure 12. Washer 33 has a central opening 39 through which the shank of the bolt 34 is passed so that the washer may be brought into close abutting relation to the under side of the bolt head.

The other end of the bolt 34 is seated in the seat 39 so that the bolt can be freely revolved. A detachable bolt head fifi adapted to be threadedly engaged on the end of the bolt 34 has the centering flange 4l on one face. This flange is tted into the opening 3l so that when the detachable bolt head is placed in the seat 30 with the flange 4l in the opening 3i a positive vcentrally positioned mount is provided for the bolt end. A cotter pin 42 is ordinarily passed through the opening 43 of the bolt head 40 and the opening 44 on the inner end of the bolt 34 to secure these two members firmly together and against unloosening action.

The traveler nut 45 has an intermediate annular recess 41 and an inner threaded passage 48 adapted to be threadedly engaged on the bolt 34. Spaced about the periphery of the two ends'of the traveler nut are a plurality of guide lugs or wings 49 and 50. The lugs 49 and 5l] are adapted to be placed in the longitudinal slots 28 to retain the nut 46 from rotative movement when the bolt may be rotated. The slots thereby guide the nut in its inward and outward travel in accordance with the direction of rotation of the bolt.

Disposed between each pair of wedge members 25 is a chuck jaw leaf of the nature shown in the perspective View of Figure l0. The chuck jaw leaf 52 has an inner curved face 53 conformable to the outer face of the tapered arbor. On the inner face of each leaf is the nut engaging member or lug 54 which is shown to be T- shaped and having flanges 55, 55 which t under the inner edges of the slots 28. The outer face of the Achuck jaw leaf 52 has friction means 55 for. engaging frictionally the inner face of a paper roll tube 58. The jaw leaves 52 each have edges or faces 51 which slidably contact the edges of the wedge members 26. i

In the drawings herein the friction means 56 are shown as comprising a plurality of longitudinal grooves or flutes which have relatively sharp edges so that they will bite into the paper of the tube 58 and firmly engage it.

The assembly of my chuck is extremely simple, due to the few parts employed and due to the simplicity of operation of the parts when assembled. Ordinarily the rst step in assembling the device is to place the washer 38 on the bolt 34 so that it is seated against the-bolt head 35. The

arbor taper or swell in its length. As may best traveler nut 46 is next threaded onto the shank of the bolt a distance sufiicient to eventually position the annular recess 41 in line with the opening 29 in the slots 28.

The lugs 49 and 50 on the traveler nut 46 are of a diameter suflicient to be inserted through the 'opening`32a between the socket 2l andthe `interior of the hollow tapered arbor 24. When the `bolt Aand the traveler nut 46 are inserted through the opening 32a, the lugs 4 9 and-50 engage in the slots `28 and the outer `end of the bolt will pass through the opening 3 l.`

The `detachable bolt head -40 s threaded onto the bolt 34 a distance sufcientto mountthe bolt for `rotative movement in the seats 30 and v32. With the annular recess 41 aligned withthe opening 29, the various chuck jaw leaves 52` are positioned onth'e outside of the arbor between panded` position shown in Figure 2to the retracted or contracted position shown in Figure 3;

Inthat event the chuck is reduced to the smallest outside diameter of the frictional faces of the leavesand the chuck is ready for insertion in a l tube such as 58 of the paper roll 59.

A socket wrench is inserted into the socket 31 in head 36 and by turning the bolt in a reverse direction the traveler nut-.46 is caused to move in an outward direction. This movement expands the leaves 52 dueto the taper of the arbor 24 and the action of the tapered faces of the wedges 26 on the wedge contacting faces 51. This operation can be accomplished quickly and with great facility due to the simplicity of the device.

As soon as the chuck `is expanded properly within the paper core of the roll, the roll is ready to be installed in the printing mechanism or in the pasting 'mechanism to be readied for being fed into-the printing presses. The head 20 is brought into position on the boss I1 and the key I8 is fitted to the keyway 22. It will be apparent that when power is applied to the spindle I6, that a firm and secure `inner grip will be had on the paper roll and that the roll can be freely revolved through this medium. As above described,

`when the roll is revolving at a speed equal to that of the paper traveling from an adjacent roll into the printing machine, the operator is ready paper from the roll 59 traveling into the printing press.

The foregoing description and the accompanying drawings are believed to clearly disclose a preferred embodiment of my invention, but it will be understood that this disclosure is merely illustrative and that such changes in the invention may be made as are fairly within the scopeand spirit of the following claims. v

I claim: i l. An expansible chuck to be secured to a drive spindle, a hollow tapered arborextending from said head and including a plurality of wedge membershaving a diminishing taper from the socket-head end to the opposite end of said arbor, said arbor having a longitudinal slot positioned between each pair of wedge members, an actuator bolt journaled in to perform the pasting operation to start the` i comprising a socket,V head having a keyway, said head being adapted said taperedarbor and including wrenchengaging means `on the end adjacent the socket-head,

`a traveler nut threadedly engaged on said actuator bolt, and having an annular exterior groove,

.slot andi its cross-head engaged in lgroove of the traveler nut.

`means on said nut `cooperable with thelongitudi- `nal Vslots to' prevent rotationtof the nut during -periods `of yrotation of the actuator bolt, `aseries `of chuck jaw leaves each having'an inner curved face conformable to the tapered arbor and outer frictionmeans, and a T-shaped nut engaging member oneach said inner curved face and having its shank inserted through a longitudinal 2.LAn expansible chuck comprising a socket- `head having a keywa'y, said head being adapted Ato besecured to a drive spindle, a `hollow tapered arbor extending from said head andincluding a `plurality of wedge members having a diminishing taper from` the socket-head end to the opposite end of said arbor, said arbor having a longitudinal` slot `positioned between each pair of 4wedge members, an actuator bolt journaled in said .tapered arbor, means for rotating said bolt,

a non-rotatable traveler nut threadedly engaged on said actuator bolt, and having an annular exterior groove, a series of chuck jaw leaves each positioned between pairs of wedge members and lcooperable therewith, and an inner T-shaped nut4 engaging member on each leaf and having its shank inserted through a longitudinal slot and its cross-head engaged. in the annular groove of the traveler nut. i

3. An expansible chuck comprisinga sockethead adapted to be secured to a drive spindle, a hollow tapered `arbor extending from said head and including a pluralityof Wedge members having a diminishing taper from the socket-head end to the opposite end of said arbor, said arbor having a longitudinal slot positioned between ber on each leaf and having its shank inserted through a longitudinal slot and its cross-head engagedV in the annular groove of the traveler nut. l l

4. An expansible chuck comprising a sockethead adapted to be secured to va drive spindle, a hollow tapered arbor extending from said head and `including a plurality of wedge members, said arbor having a longitudinal slot-positioned between each pair of wedge members,` an actuator bolt journaled in said tapered arbor and including wrench engaging means on theend adjacent the socket-head, a non-rotatable traveler nut threadedly engaged on said actuator bolt, and having an annular exterior groove, `a series of chuck jaw leaves each positioned between pairs of wedge members and cooperable therewith, and an inner-T-shaped nut engaging lug on each leaf passing through a longitudinal slot and engageable in the annular groove of the traveler nut. 5. An expansible chuck comprising a sockethead adapted to be secured to a drive spindle, a hollow tapered arbor extending from said head and including a plurality of wedge members, said arbor `having a longitudinal slot positioned between each pair of wedge members, an actuator bolt journaled insaid tapered arbor, a nonrotatable traveler nut threadedly engaged on said actuator bolt, and having an annular exterior groove, a series of chuck jaw leaves each the annular positioned between pairs of wedge members and (zo-operable therewith, and an inner nut engagingmember on each leaf passing through a longitudinal slot 'and engageable in the annular groove of the traveler nut.

6. An expansible chuck comprising a sockethead adapted to be secured to a drive spindle, a hollow tapered arbor extending from said head and including a plurality of wedge members, said arbor having a longitudinal slot positioned between each pair of wedge members, an actuator bolt journaled in said tapered arbor and including wrench engaging means on the end adjacent the socket head, a non-rotatable traveler nut threadedly engaged on said actuator bolt, and having an annular exterior groove, a series of chuck jaw leaves each positioned between pairs of wedge members and cooperable therewith, and an inner nut engaging member on each leaf passing through a longitudinal slot and engageable 1n the annular groove of the traveler nut.

7. An expansible chuck comprising a hollow frusto-conical arbor having a plurality of spacedapart wedge members on the exterior thereof and slots intermediate of the wedge members, an actuator bolt journaled in said arbor, a traveler nut on said actuator bolt, wings on the traveler nut slidable in said slots, a series of chuck jaw leaves disposed between pairs of wedge members and cooperable therewith, means on each leaf passing through an adjacent slot in the arbor and cooperable with the traveler nut.

8. An expansible chuck comprising a hollow frusta-conical arbor having a plurality of spacedapart wedge members on the exterior thereof and slots intermediate of the wedge members, an actuator bolt journaled in said arbor, a nonrotatable traveler nut on said actuator bolt, a series of chuck jaw leaves disposed between pairs of wedge members and cooperable therewith, a T-shaped lug on each leaf having its shank passing through an adjacent slot in the arbor and the T-head cooperable with the traveler nut, and the inner sidel of the arbor adjacent the inner edges of the slots.

9. An expansible chuck comprising a hollow frusta-conical arbor having a plurality of spacedapart wedge members on the exterior thereof and openings intermediate of the wedge members, an actuator bolt journaled in said arbor, a nonrotatable traveler nut on said actuator bolt, a series of chuck jaw leaves disposed betweenA pairs of wedge members and cooperable therewith, a lug on each leaf passing through an adjacent opening in the arbor and cooperable with the traveler nut.

10. An expansible chuck comprising a hollow frusto-conical arbor having a plurality of spacedapart wedge members on the exterior thereof and openings intermediate of the wedge members, an actuator bolt journaled in said arbor, a non-rotatable traveler nut on said actuator bolt, a series of chuck jaw leaves diposed between pairs of wedge members and cooperable therewith, means passing through each opening in the arbor and cooperable to associate each leaf with the traveler nut.

FRANKLIN P. BENNETT. 

